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Table 5 Effect of Fixed versus Optimal AV Delay on Echo Doppler Parameters at Increased Atrial Pacing Rates

From: Shortening of atrioventricular delay at increased atrial paced heart rates improves diastolic filling and functional class in patients with biventricular pacing

Echo Doppler Variable

Δ Fixed vs. Opt AV Delay

% Δ

P

Diastolic Filling Time (ms)

40.2 ± 25

14

< 0.001

Mitral inflow VTI (cm)

0.92 ± 2

5

0.04

Systolic Ejection Time (ms, n = 13)

11 ± 15

4

0.011

LVOT VTI (cm, n = 13)

0.56 ± 1.6

3

0.21

  1. Values are Mean ± SD or percent change
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Cardiovascular Ultrasound

ISSN: 1476-7120

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